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LANDING GEAR
Description
The main landing gear consists of two trailing link-type assemblies. The main landing gear retracts inward towards the centerline of the fuselage. The main landing gear is hydraulically actuated by hydraulic system 3, and electrically controlled by the proximity sensing electronic unit (PSEU).
The nose gear is a forward retracting assembly. The nose gear and forward nose gear doors are hydraulically actuated by hydraulic system 3, and electrically controlled by the PSEU.
A manual landing gear extension feature is provided.

 LANDING GEAR/BRAKES Description  Vol. 2  15.10.2 
Oct 05/06 

LANDING GEAR (CONT'D) Components Main Landing Gear (MLG) Each main gear assembly consists of:
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Main beam;

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Nitrogen-charged/oil-filled shock strut;

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Trailing link;

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MLG actuator;

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Internal downlock mechanism;

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Axle, brake, and wheel assemblies;

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Uplock pins;

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MLG doors; and

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Weight-on-wheels proximity sensors.

Main Wheel Bins
Each main gear assembly retracts inward into wheel bins recessed in the main landing gear bay. Each wheel contains a single-loop overheat detection wire, to provide an EICAS warning should a wheel overheat occur.
MLG Uplocks and Downlocks
The MLG is held in the up-and-locked position by mechanical uplocks. With the gear extended, internal locking mechanisms within the MLG actuators lock the gear in the down position. On the ground, MLG ground locking pins can be inserted into the MLG actuator.
MLG Doors
MLG doors, mechanically attached to each of the MLG struts, allow for partial enclosure of the gear when retracted. In the retracted position, brush seals on the door and wheel bins provide an aerodynamic seal between the tires and the surrounding aircraft structures.
MLG Weight-On-Wheels (WOW) Sensors
Two WOW proximity sensors are incorporated in each main gear assembly. They are used to prevent landing gear retraction on the ground, and they provide “ground” or “air” status for other aircraft systems via the PSEU.

 LANDING GEAR/BRAKES Description  Vol. 2  15.10.3 
Oct 05/06 

Main Landing Gear Figure 15.10.2

Nose Landing Gear (NLG)
The nose gear consists of:
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Nose gear shock strut (nitrogen-charged/oil-filled);

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Nose gear actuator;

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Drag brace with downlock;

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Steering actuator;

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Axle and wheel assembly;

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Uplock pin;

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NLG doors; and

.
Weight-on-wheels proximity sensors.

NLG Uplocks and Downlocks
The nose gear is held in the up-and-locked position by a mechanical uplock. With the gear extended, an overcenter locking mechanism in the drag brace holds the gear in the down-and-locked position. On the ground, a NLG ground locking pin can be inserted in the drag brace mechanism.
　
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本文链接地址：庞巴迪挑战者605公务机机组操作手册 CL605-起落架 LANDING GEAR(2)